source: code/Website/open-flash-chart/elements/axis/AxisLabel.as@ 7937

/* */

package elements.axis {
        
        import flash.display.Sprite;
    import flash.text.TextField;
        import flash.geom.Rectangle;
        
        public class AxisLabel extends TextField {
                public var xAdj:Number = 0;
                public var yAdj:Number = 0;
                public var leftOverhang:Number = 0;
                public var rightOverhang:Number = 0;
                public var xVal:Number = NaN;
                public var yVal:Number = NaN;
                
                public function AxisLabel()     {}
                
                /**
                 * Rotate the label and align it to the X Axis tick
                 * 
                 * @param       rotation
                 */
                public function rotate_and_align( rotation:Number, align:String, parent:Sprite ): void
                { 
                        rotation = rotation % 360;
                        if (rotation < 0) rotation += 360;
                        
                        var myright:Number = this.width * Math.cos(rotation * Math.PI / 180);
                        var myleft:Number = this.height * Math.cos((90 - rotation) * Math.PI / 180);
                        var mytop:Number = this.height * Math.sin((90 - rotation) * Math.PI / 180);
                        var mybottom:Number = this.width * Math.sin(rotation * Math.PI / 180);
                        
                        if (((rotation % 90) == 0) || (align == "center"))
                        {
                                this.xAdj = (myleft - myright) / 2;
                        }
                        else
                        {
                                this.xAdj = (rotation < 180) ? myleft / 2 : -myright + (myleft / 2);
                        }

                        if (rotation > 90) {
                                this.yAdj = -mytop;
                        }
                        if (rotation > 180) {
                                this.yAdj = -mytop - mybottom;
                        }
                        if (rotation > 270) {
                                this.yAdj = - mybottom;
                        }
                        this.rotation = rotation;

                        var titleRect:Rectangle = this.getBounds(parent);
                        this.leftOverhang = Math.abs(titleRect.x + this.xAdj);
                        this.rightOverhang = Math.abs(titleRect.x + titleRect.width + this.xAdj);
      }
   }
}